Podcast
Questions and Answers
At which stage of gestation does craniofacial development begin?
Which of the following facial primordia fuse to form the face?
During which week of fetal development does the palate form?
How many bones make up the face?
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What is the term for the fibrous joints between bones?
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What is the term for the soft spots in the skull that close during childhood?
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Study Notes
Craniofacial Development
Embryonic Development
- Craniofacial development begins at 3 weeks gestation
- Neural crest cells migrate to form facial primordia
- Five facial primordia fuse to form the face:
- Frontonasal prominence
- Maxillary prominence
- Mandibular prominence
- Lateral nasal prominence
- Frontal prominence
Fetal Development
- Week 8-12: Facial features begin to take shape
- Week 12-16: Palate forms, and facial bones begin to ossify
- Week 16-20: Facial bones continue to grow and develop
Postnatal Development
- Infancy: Bones continue to grow and develop
- Childhood: Facial bones continue to ossify and mature
- Adolescence: Facial bones reach adult size and shape
Facial Bone Structure
Bones of the Face
- Cranium: Protects the brain
- Face: Composed of 14 bones
- Vomer
- Zygoma
- Maxilla
- Lacrimal
- Palatine
- Inferior nasal conchae
- Mandible
- Nasal bones
- Frontal bone
- Ethmoid bone
- Sphenoid bone
Bony Landmarks
- Nasal aperture
- Orbital cavity
- Zygomatic arch
- Mandibular fossa
- Palatine bone
Facial Bone Relationships
- Sutures: Fibrous joints between bones
- Synchondroses: Cartilaginous joints between bones
- Fontanelles: Soft spots in the skull that close during childhood
Craniofacial Development
Embryonic Development
- Craniofacial development begins at 3 weeks gestation, with neural crest cells migrating to form facial primordia
- Five facial primordia fuse to form the face: frontonasal, maxillary, mandibular, lateral nasal, and frontal prominences
Fetal Development
- Weeks 8-12: Facial features begin to take shape
- Weeks 12-16: Palate forms, and facial bones begin to ossify
- Weeks 16-20: Facial bones continue to grow and develop
Postnatal Development
- Infancy: Facial bones continue to grow and develop
- Childhood: Facial bones continue to ossify and mature
- Adolescence: Facial bones reach adult size and shape
Facial Bone Structure
Bones of the Face
- 14 bones compose the face, including:
- Cranium (protects the brain)
- Vomer
- Zygoma
- Maxilla
- Lacrimal
- Palatine
- Inferior nasal conchae
- Mandible
- Nasal bones
- Frontal bone
- Ethmoid bone
- Sphenoid bone
Bony Landmarks
- Nasal aperture
- Orbital cavity
- Zygomatic arch
- Mandibular fossa
- Palatine bone
Facial Bone Relationships
- Sutures: Fibrous joints between bones
- Synchondroses: Cartilaginous joints between bones
- Fontanelles: Soft spots in the skull that close during childhood
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Description
This quiz covers the embryonic and fetal stages of craniofacial development, including the formation of facial primordia and the development of facial features.
